Pixel Group Column Token Display Architecture for Signal Distribution
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Solution Overview
Problem
Active-matrix display systems face challenges in signal distribution over large display substrates, leading to power and ground distribution issues and difficulties in proper pixel control due to high data loading rates.
Innovation Solution
The implementation of a flat-panel display architecture with a column controller providing column data through separate column-data lines to each row group of pixels, allowing for independent and concurrent data transmission, and a row controller using token-passing circuits for row-select signals, enabling efficient control of inorganic micro-light-emitting diodes with pulse width modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If active-matrix control scheme is used with conventional row-by-row data loading, then pixel control precision is improved, but signal distribution quality deteriorates over large substrates due to high data loading rates
Solution Approach 1:
The display substrate is divided into multiple row groups, with each row group receiving data through separate column-data lines. This segmentation allows parallel data transmission to multiple row groups simultaneously, reducing the overall data loading rate required per line and improving signal distribution quality across large substrates while maintaining pixel control precision.
2Productivity
If data is loaded into successive rows at high rate for AM display, then display refresh rate is maintained, but power and ground distribution degrades leading to control difficulties
Solution Approach 1:
By dividing the display into multiple row groups with separate column-data lines, the data loading task is distributed across multiple parallel channels. This reduces the current and data rate burden on each individual line, improving power and ground distribution stability while maintaining the overall display refresh rate through concurrent data transmission to multiple row groups.
3Device complexity
If conventional column-data lines are used for all rows, then device complexity is reduced, but signal integrity deteriorates over large substrates
Solution Approach 1:
The column-data lines are segmented into multiple separate lines, each dedicated to a specific row group. This segmentation improves signal integrity by reducing the data loading rate and electrical burden on each individual line, thereby reducing susceptibility to noise and interference. While this increases the number of control lines compared to a shared configuration, the segmentation enables reliable operation over large substrate areas.
Data Source
AI summary
A flat-panel display comprises a display substrate, an array of pixels distributed in rows and columns over the display substrate, the array having a column-control side, and column controller disposed on the column-control side of the array providing column data to the array of pixels through column-data lines. In some embodiments, rows of pixels in the array of pixels form row groups and each column of pixels in a row group receives column data through a separate column-data line. In some embodiments, each pixel in each column of pixels in the array of pixels is serially connected and each pixel in the array of pixels comprises a token-passing circuit for passing a token through the serially connected column of pixels.